Gear pump



Sept 6, 1949' G. w. MULLER 2,481,143

GEAR PUMP Filed March 8, 1946 f. n mlmwm s --rn Wm/mf? atenteci Sept. 6, i949 I UNITED STATES PATENT OFFICE GEAR PUMP Geza. Waiter Mller, Bron, France, assignmto Societe Industrielle Generale de Mecanique Appliquee (S. l. G. M. A.), Venissieux (Department of Rhone), France, a society of France Application March 8, 1946, Serial No. 652,896 In France April 5, 1945 2 Claims. (Cl. 103--126) The present invention has for its 'object imwhich is constituted by the following elements: provements in gear pumps, and more particu- (a) A longitudinal conduit Ia extending larly, although not exclusively, in p-umps of this throughout plate 5; kind as are utilized for the manufacture of arti- (b) A transverse recess I5b provided in the :iicial textiles. A 5 front face of body I;

The chief object of my invention is to provide (c) A second longitudinal conduit I5c, also a pump of this kind which is better adapted to provided in body I, connected with conduit I5a meet the requirements of practice than those by said recess Ilib and extending parallel to the used up to this time. bearing Ia of control shaft 8;

A preferred embodiment of the present inven 10 (d) The inside of a U section ring I 5d (for tion will be hereinafter described with reference instance of synthetic rubber) acting also as to the accompanying drawings, given merely by packing member and pulsation damper; and way ofA example, and in which: (e) A conduit I5e through which the iiuid Fig. 1 shows, in longitudinal section on the discharged by the pump flows out therefrom. line I--I of Fig. 3, a pump made according to 10 In order to obtain the desired lubrication of the invention; control shaft 8 over the whole length of its bear- Figs. 2, 3 and 4 are sections on the lines lI-II, ing Ia, the element I5c of the discharge system III-III and IV--IV of Fig. 1; is placed in communication with the inside of Fig. 5 is a.view on an enlarged scale showing, said bearing through an elongated passage conin perspective, a portion of the pump element stituted by a slot I6 the longitudinal axis of visible on Fig. 4. which is parallel to said conduit element. Slot In the following description it will be sup- IB extends the entire length of bearing Ia. posed, by Way of example, that the pump that This construction ensures a self-lubrication is considered is a gear pump for viscous matters of the control shaft, over the whole journalled serving to the manufacture of artificial textiles surface thereof in the pump body, by means of such as, for instance, viscose, cellulose acetate, the very fluid driven by the pump, and without a cupro-textile, artificial Wool, a synthetic textile danger of stagnation of any amount of said material, etc. uid inside the means which connect said con- Preferably, as shown the pump includes four duit element with said shaft bearing. `iuxtaposed pieces one of which constitutes the 0f course, the invention is not; in any way pump body l, the second the plate 2 in which limited to the embodiments above described. are provided the circular bores 3 for the hous- What I claim is: ings of the pump gears 4a, 4b, the third a distance 1, A gear pump Which comprises, in combinaplate 5 and the fourth a closure plate 6. These tion, at least; two gears, a pump body provided four pieces are connected 'GOgetheI by bOltS 'l 0I' 35 with a bore adapted to act as shaft bearing,

analogous means. and a shaft journalled in overhung fashion in A bore la in pump body I forms a bearing said bearing carrying at one end one of said for control shaft 8 which carries, at one of its gears, Said body being provided with passages ends. pinion 4a keyed thereon by means of a forming a discharge conduit system for the uid lug 9- The other Pinion Bb, in mesh with pinion 4o driven by said pump after its flow between said to is mounted loose 0n a Spindle l0 Xed 150 gears, said conduit system including a groove in Dump bdy L said body parallel to said shaft bearing and close The suction and discharge chambers provided thereto through which the full delivery of the in plate 2 on either side of the pair 0f gears pump circulates, communicating with the inside are limited by Oblique Walls Il. |2- 45 of said shaft bearing over the Whole length of The suction chamber limited by surface II said bearing.

is in communication with the suction conduit 2. A gear pump which comprises, in combinai3 of the pump. tion, at least two gears, a pump body provided The discharge chamber limited by oblique with a bore adapted to act as shaft bearing, and wall i! leads to the discharge conduit system a shaft journalled in overhung fashion in said bearing carrying at one end one of said gears, a cap carried by said body forming therewith a closed chamber at the other end of said shaft, and a packing ring against the inner face of said cap to prevent leakage between said cap and said shaft, said body being provided with passages forming a discharge conduit system for the fluid driven by said pump after its ow between said gears, said conduit system including a groove in said body parallel and close to said shaft bearing, opening into said chamber, through which the full delivery of the pump circulates communicating with the inside of said Shaft bearing throughout the whole length of said bearing, and further including an outlet passage starting from said chamber and leading to the outside of the body.

GZA WALTER MLLER.

4 REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,372,576 Tullmann Mar. 22, 1921 1,379,587 Fisher May 24, 1921 1,682,842 Hamer 1 Sept. 4, 1928 10 1,927,749 Kimmig sept. 19, 1933 2,276,107 Simons Mar. 10, 1942 2,386,257 Muller Oct. 9, 1945 FOREIGN PATENTS 15 Number Country Date 563,101 Germany Nov. 2, 1932 

